Concrete mixer



Nov. 8, 1927. 1,648,546

M. GILSON CONCRETE MIXER Filed Dec.- 16, 1926 2 Sheets-Sheet l Nov. 8,1927. 1,648,546 M. GILSON CONCRETE MIXER Filed Dec: 16,. 1926 2Sheets-Sheet 2 Patented Nov. 8, 1927.

MICHAEL GILSOIN, OF PORT 'WASIIINGTON,

PATENT QFFICE.

PANY, OF PGRT W'ASHINGTON, WISCONSIN.

ooivonnrn MIXER.

Application filed December This invention relates to a concrete mixer.

In concrete mixers as heretofore constructed, it is the usual practiceto provide means for dumping the mixing drum or rocking back to fillingposition which are provided with gear teeth, and toprovide a latch-likemember for locking the gear teeth to thus hold the drum in either of itstwo positions. However, it has been found that these devices frequentlybreak the gear teeth and are not wholly satisfactory.

This invention is designed to overcome the defect noted above, andobjects of such invention are to provide a novel form of lock for thetilting means which does not place any strain upon the teeth, and whichdoes not engage the teeth, but instead which frictionally locks one ofthe rotary members to thus hold the drum in the desired position.

Further objects are to provide a simple and novel type of locking meanswhich'may be instantly operated, which is strong and of ruggedconstruction, and not likely to get out of order, and which may beapplied to existing types of mixers. A further ob ect of this inventionis to provide a novel form of stop for the mixer, so that the mixer willbe arrested in its rocking motion at the desired points, and to soconstruct the stop that it may be adjusted, as required.

An embodiment of the invention is shown in the accompanying drawings inwhich Figure 1 is a fragmentary side elevation of the concrete mixer;Figure 2 is a sectional view adjacent one of the trunnions of therocking or tilting frame.

Referring to the drawings, it will be seen that the mixing drum isindicated by the reference character 1, and is carried by the rockingyoke 2. This rocking yoke is provided with trunnions 3 which are carriedin frames 4. One of the trunnions is rigidly joined by means of a spiderto an internal gear wheel 5. This internal gear wheel meshes with asmallpinion 6 carried by a hand wheel shaft7. The shaft 7 is carried in abearing 8 formed integrally with a bracket 9 bolted to the frame 4. Thehand wheel shaft 7 carries a manipulating hand wheel 10 and is alsoprovided with a friction drum 11, such drum being provided with anannular groove, as indicated in Fig ure 2. A U=shaped metal strapmember, preferably of circular cross section is seated 16, 1926. SerialNo, 155,170.

within the groove, as shown in the drawings and indicated by thereference character 12. The ends of the U-shaped member pass throughlaterally extended portions of the bracket 9, as most clearly shown inFigure 1. These terminal portions are threaded, as indicated at 18 and14; in Figure 1. The portion 13 is clamped to the bracket 9 in anadjustable manner by means of nuts 15. The portion 14: extends throughan aperture in the bracket on. the other side. and passes through thehub 16 provided with a lever 17. The hub 16 and the adjacent portion ofthe bracket are provided with cooperating cam faces 19. Shoulders 20(see Fig. 2) are pro- \VlClGd on the bracket and hub for limiting theunlocking motion of the lever 17. All that is necessary is to swing thelockinglever to cause co-action of the cam faces 19. This t ghtens theclamping strips 12 and frictionally locks the mixing drum in position.

It will be seen, therefore, that the utmost ease of locking the drum issecured by this invention and also that there is no danger of strippingor breaking off a tooth of the gear wheel of the mixing drum, asfrequently happens with prior structure, for with applicants device,nothing drops in between the teeth of this gear and, consequently, thebreaking is eliminated.

It is to be noted further by referring to the drawings, that means areprovided for arresting the motion of the mixing drum in any desiredposition. This means is also adjustable, as will appear. From Figure 2,it will be seen that a disc-like member 21 is rigidly attached to thegear 5. A second disc 22 is loosely carried by the bolt 23 which extendsthrough the trunnion 3 of the mixing drum and locks the parts together.The members 21 and 22 are provided with interlocking teeth 24: formed inthe manner of serrations or roughened portions, as shown in Figure 2. Anut 22 is screwed upon a bolt 23 and thus locks the discs 21 and 22together. The disc 22 is, therefore, adjustable. with respect to thegear wheel, and it is to be noted from the drawings, that such disccarries a stop arm 25 as an integral portion thereof. This stop arm 25may be webbed, as indicated in Figure 1, if desired. It is adapted tocontact with the bearing 8 and thus arrest the motion of the mixing dran when it is tilted. I l

is se that the Wisconsin, ssrenon To KWrK-Mrx COM- exact angle at whichthe mixing drum'will stop may be varied, as needed.

It Wlll be seen that an extremely simple type of stop and of lockingmeans has been provided which does not tend to break any teeth in thegear train for tilting the drum,

and which also provides an adjustable stop,

method of locking the machine" by a latch in engagement with the gearteeth, it will be noted that the machine must be brought to a. dead stopbefore a lock can be effected, and this obviously results in loss oftime. It is the primary object of my presentinvention to avoid such lossof time by utilizing a friction brake mechanism, as described, wherebythe m xer drum can be brought to a dead stop while the machine is inmotion in either direction.

1. A tilting device comprising a tilting member, a frame for supportingsaid tilting member, said member having trunnions extending through saidframe, a gear car ried-by one of said trunnions, a pinion meshing withsaid gear, a jack shaft for operat- 'ing said pinion, a friction drumcarried by said jack shaft, and friction means for locking said frictiondrum in any desired position, whereby the tilting member will beheldlocked in position.

2. A tilting device comprising a tilting supporting means, a gearrigidly attached to said means, a pinion meshing with said gear, a: handwheel fixed rigid with said pinion and provided with a grooved frictiondrum, a friction strap passing around said' friction drum and positionedwithin said groove, and means for tensioning said friction strap. V

3. A tilting device comprising tilting means having projectingtrunnions, a frame pivotally carrying said trunnions, a gear wheel rigidwith one of said trunnions, a

pinion meshing with saidgear wheel andv provided with a shaft, a bearingsupported rom said frame and carrying said shaft, means for rotatingsaid shaft, a friction drum carried by said shaft and located adjacentsaid bearing, a U-shaped metalstrap surrounding said friction drum andhaving one end secured to a stationary portion of p the machine and itsother end slidably passing through. a stationary portion of'the ma;

chine, and cam means for tightening said last mentioned end of thestrap.

4:. A tilting member having projecting trunnions, a frame pivotallysupporting said trunnions, a gear wheel rigid with one of saidtrunnions, means for operating said gear wheel to tilt said member,adisc carried bysaidgear wheel, a second disc adapted to be clamped tosaid first mentioned disc and provided with a projecting arm, and a stopagainst which said arm is adapted to contact. Y

5; A tilting yoke provided with projecting trunnio'ns, a frame carryingsaid trun'nions,

a gear wheel rigid with one of said trunnions, a pinion 'meshing withsaid gear wheel, said gear wheel having a disc, rigid therewith, asecond disc mounted adjacent said first mentioned disc, said discshaving cooperating roughene'dgfaces, means for clamping said discstogether, an arm carried by" said second disc, and a stop against whichsaid arm is adapted to contact.

6. A tilting yoke provided with projecting trunnions, a frame carryingsaid trunnions, a gear wheel rigid with one of said trun nions, a pinionmeshing with said gear wheel, said gear wheel having a disc rigidtherewith, a second disc mounted adjacent said first mentioned disc,said discs having cooperating roughened faces, means for clamping saiddiscs together, an arm carried by said second disc, and a stop againstwhich said arm is adapted to contact, means for rotating said pinionincludinga jack shaft, friction drum carried by said jack shaft, afriction band engaging said friction drum, and means for tensioning saidfriction band.

7 A tilting member, means for pivotally supporting said member includingtrunnions,

a friction drum o-peratively connected to said trunnions, a frictionband encircling said friction drum, and means for tensioning said bandto lock said friction drum, whereby said member may be locked againsttilting.

8. A. tilting device comprising a tilting 'pivotall'y supported member,a gear opera tively associated with said member, a jack shaft having apinion meshing with said gear, means for rotating said jack shaft totilt said member,- and cam controlled fricti'on means forrestrainingsaid jack shaft against rotation, whereby said member may befrictiona lly held in tilted position.

; In testi'monyth at I claim the foregoing I have hereunto set my handat Port Tashington, in the county of Wisconsin. I

MICHAEL. eiLsoa.

of Ozaukee, and State

